VOA慢速英语:什么是货运机器人？

cargo - n. goods carried on a ship, aircraft, or vehicle

delivery – n. the act of transporting and releasing something

consumer – n. someone or something that uses goods

lock – v. to make a secure connection

track – v. to follow

cute – adj. having a pleasing appearance

autonomy – n. self-directing freedom

durable - adj. staying strong and in good condition over a long period of time

wagon – n. a four-wheeled vehicle for transporting goods